Hmm, an interesting question.
Generally, most swingers events will want to attract as many females as possible, due to the supply and demand (there are always more guys [especially single guys] interested in attending swingers events than females).
Although our function area is sort of attached to Langtrees, the two cater for different groups: Langtrees caters to clients who are looking for some one-on-one time with a working lady and are comfortable paying for a personal service. Swingers functions are more for people who like to engage in adult play with other adults in an environment that they are comfortable with. Private parties tend to be finance free but dedicated premises such as ours (and Deltas and Club XS) will usually ask for a cover charge on entry. People "in the scene" understand that clubs need to charge a fee in order to cover operating costs (power, nibbles, cleaning, condoms, water and so on).
As far as I am aware, one does not normally see working ladies trying to organise clients at a swingers function. This isn't because swingers events are a supposed "free fuckfest" but because it is more of a party atmosphere. If a lady went up to a couple or a single guy at a swingers event and said "want to go jump into bed", the other replies "sure" and the lady said "then it'll cost you X dollars" then I assume there would be a strong negative reaction.
So the short answer to your question is "no, we don't need working ladies at the Swingers events, but females are always welcome".
On the other hand, if you are interested in organising more (paid) bookings, then talk to Sue or our receptionists and I'm sure they will be able to help you out. We have our numbers all over the place, drop me a PM if you have any follow up questions that you want to be a bit more discrete with. Or post here if they are related to the swingers functions.